One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,8)(5,6)(17,18,22,23,21,26,19,25)(20,24,29,30,28,32,27,31)(2,6)(7,8)(9,10)(11,14)(12,13)(15,16)(18,23)(19,22)(20,28)(24,31)(25,26)(30,32) involution — undirected(2,6)(7,8)(10,13)(14,16)(17,19,21,22)(18,23,26,25)(20,29,28,27)(24,31,32,30)(1,3,5,4)(2,7,6,8)(10,13)(14,16)(17,20)(18,24)(19,27)(21,28)(22,29)(23,30)(25,31)(26,32)(1,4,5,3)(2,8,6,7)(9,11,12,15)(10,14,13,16)(20,28)(24,32)(27,29)(30,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.